Home / 31,789.07-47,678.21-8,417.87

Finding the Fourth Proportional to 31,789.07, 47,678.21 and 8,417.87

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Solution

The fourth proportional to 31,789.07, 47,678.21 and 8,417.87 is: 12,625.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,789.07 : 47,678.21 = 8,417.87 : x
  2. Step 2: Convert to fraction form
    31,789.07/47,678.21 = 8,417.87/x
  3. Step 3: Cross multiply
    31,789.07x = 47,678.21 × 8,417.87
  4. Step 4: Simplify right side
    31,789.07x = 401,348,931.52
  5. Step 5: Solve for x
    x = 401,348,931.52/31,789.07
  6. Step 6: Final answer
    x = 12,625.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.